US20110019405A1 - Street lamp - Google Patents
Street lamp Download PDFInfo
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- US20110019405A1 US20110019405A1 US12/700,928 US70092810A US2011019405A1 US 20110019405 A1 US20110019405 A1 US 20110019405A1 US 70092810 A US70092810 A US 70092810A US 2011019405 A1 US2011019405 A1 US 2011019405A1
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- US
- United States
- Prior art keywords
- light
- street lamp
- section
- traffic lane
- light incident
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/08—Lighting devices intended for fixed installation with a standard
- F21S8/085—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light
- F21S8/086—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light with lighting device attached sideways of the standard, e.g. for roads and highways
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/08—Refractors for light sources producing an asymmetric light distribution
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/0091—Reflectors for light sources using total internal reflection
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/10—Outdoor lighting
- F21W2131/103—Outdoor lighting of streets or roads
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0075—Arrangements of multiple light guides
- G02B6/0078—Side-by-side arrangements, e.g. for large area displays
Definitions
- the disclosure generally relates to street lamps, and particularly to a street lamp with anti-glare function.
- FIG. 1 is an isometric view of a street lamp in accordance with a first embodiment, the street lamp being applied to illuminate a traffic lane, and the street lamp including a solid-state light source and a light guiding plate.
- FIG. 4 is a graph of light intensity distribution of the street lamp of FIG. 1 .
- FIG. 7 is similar to FIG. 3 , but showing application of a street lamp in accordance with a third embodiment, the street lamp including a solid-state light source and a light guiding plate.
- FIG. 14 is an isometric view of the light guiding plate of FIG. 13 .
- FIG. 15 is an isometric view of a street lamp, in accordance with a seventh embodiment.
- the plate 122 can be made of light-pervious material, such as resin, silicone, epoxy, polyethylene terephthalate, polymethyl methacrylate, or polycarbonate. Alternatively, the plate 122 can be made of glass, or other suitable materials. Referring also to FIG. 2 , the plate 122 is prismoid-shaped, and includes a light incident surface 1221 and a light output surface 1222 at two opposite sides thereof, and a peripheral side surface 1223 . The peripheral side surface 1223 is located between and adjoins both the light incident surface 1221 and the light output surface 1222 . In this embodiment, the light incident surface 1221 is a rectangular plane surface.
- FIG. 4 is a graph illustrating light intensity distribution of the street lamp of FIG. 1 in one example.
- a point C in the graph illustrates that the maximum light intensity in the second section 112 is about 950 candela (cd).
- a point D in the graph illustrates the maximum light intensity in the first section 110 is about 550 cd.
- the driver P when the driver P approaches at the second section 112 , he/she can also avoid experiencing uncomfortable glare, because the plate 122 deviates light from the light source 121 along the positive X-axis direction, and the X-axis direction is opposite to a viewing direction of the driver P's eyes.
- the first surface portion 3110 is located at a side of the plate 322 adjacent to the first section 310 of the traffic lane 31 .
- the second surface portion 3112 is located at another side of the plate 322 farther away from the first section 310 . That is, the second surface portion 3112 is located adjacent to the second section 312 of the traffic lane 31 .
- the first surface portion 3110 is an inclined flat surface relative to the light incident surface 3221 , and the first surface portion 3110 is slanted toward a positive X-axis direction.
- the second surface portion 3112 is parallel to the light incident surface 3221 .
- a street lamp 50 in accordance with a fifth embodiment includes a solid-state light source 521 and a light guiding plate 522 .
- the light guiding plate 522 includes a light incident surface 5221 , a light output surface 5222 , and a peripheral side surface 5223 .
- the light output surface 5222 includes a first surface portion 5110 , and a second surface portion 5112 .
- the street lamp 50 differs from the street lamp 30 in that the first surface portion 5110 is an arc-shaped surface, and the second surface portion 5112 is a plane surface substantially parallel to the light incident surface 5221 .
- the first surface portion 5110 is a concave surface with an arc generatrix extending parallel to the Y-axis, and a gradient of the first surface portion 5112 increases gradually along a positive X-axis direction.
Abstract
An exemplary street lamp includes a solid-state light source and a light guiding plate. The light source is used to emit light to illuminate a portion of the traffic lane. The illuminated portion includes a first section and a second section at opposite sides of the projection of the light source on the traffic lane. The solid-state light source defines a central axis perpendicular to a lengthwise direction of the traffic lane. The plate includes a light incident surface and a light output surface at opposite sides thereof. The plate is used to deviate the light from the light source. In this manner, a maximum light intensity in the first section is less than or equal to 60 percent of a maximum light intensity in the second section.
Description
- 1. Technical Field
- The disclosure generally relates to street lamps, and particularly to a street lamp with anti-glare function.
- 2. Description of Related Art
- Nowadays, light emitting diodes (LEDs) are extensively used as light sources due to their high luminous efficiency, low power consumption, and long lifespan. Although the bright light emitted by LEDs is useful to illuminate a dark environment, it can be uncomfortable and even painful if it shines directly into a person's eyes, as well as dangerous. For example, as shown in
FIG. 16 , in a typical application, theLEDs 101 are arranged in sequence along a horizontal direction and above atraffic lane 103 to provide overhead lighting. Because theLEDs 101 emit light radially, it may be difficult for aperson 102 in avehicle 104 to avoid looking directly at the light. - Therefore, what is needed is a street lamp that overcomes the described limitations.
- Many aspects of the disclosure can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
-
FIG. 1 is an isometric view of a street lamp in accordance with a first embodiment, the street lamp being applied to illuminate a traffic lane, and the street lamp including a solid-state light source and a light guiding plate. -
FIG. 2 is an isometric view of the light guiding plate ofFIG. 1 . -
FIG. 3 is a schematic view illustrating application of the street lamp ofFIG. 1 , as seen from a lateral view of the traffic lane. -
FIG. 4 is a graph of light intensity distribution of the street lamp ofFIG. 1 . -
FIG. 5 is similar toFIG. 3 , but showing application of a street lamp in accordance with a second embodiment, the street lamp including a solid-state light source and a light guiding plate. -
FIG. 6 is an isometric view of the light guiding plate ofFIG. 6 . -
FIG. 7 is similar toFIG. 3 , but showing application of a street lamp in accordance with a third embodiment, the street lamp including a solid-state light source and a light guiding plate. -
FIG. 8 is an isometric view of the light guiding plate ofFIG. 7 . -
FIG. 9 is similar toFIG. 3 , but showing application of a street lamp in accordance with a fourth embodiment, the street lamp including a solid-state light source and a light guiding plate. -
FIG. 10 is an isometric view of the light guiding plate ofFIG. 9 . -
FIG. 11 is similar toFIG. 3 , but showing application of a street lamp in accordance with a fifth embodiment, the street lamp including a solid-state light source and a light guiding plate. -
FIG. 12 is an isometric view of the light guiding plate ofFIG. 11 . -
FIG. 13 is similar toFIG. 3 , but showing application of a street lamp in accordance with a sixth embodiment, the street lamp including a solid-state light source and a light guiding plate. -
FIG. 14 is an isometric view of the light guiding plate ofFIG. 13 . -
FIG. 15 is an isometric view of a street lamp, in accordance with a seventh embodiment. -
FIG. 16 is a side view illustrating glare that can occur from light of typical LEDs. - Reference will now be made to the drawings to describe several embodiments of the street lamp, in detail.
- Referring to
FIG. 1 , astreet lamp 10 according to a first embodiment, includes a solid-state light source 121 and a light guidingplate 122. Thestreet lamp 10 is used to illuminate atraffic lane 11. - The
light source 121 can be a LED. The LED can be a white LED for emitting white light. Alternatively, the LED may be another suitable LED for emitting a monochromatic light, such as red, green, blue, or yellow light. In addition, thelight source 121 can be an LED chip. Thelight source 121 defines a central axis M parallel to a Z-axis of a defined Cartesian coordinate system, as shown inFIG. 1 . In this embodiment, the Z-axis is perpendicular to thetraffic lane 11. In alternative embodiments, the Z-axis may be perpendicular to a lengthwise direction of the traffic lane but not necessary to be perpendicular to thetraffic lane 11. - The
plate 122 can be made of light-pervious material, such as resin, silicone, epoxy, polyethylene terephthalate, polymethyl methacrylate, or polycarbonate. Alternatively, theplate 122 can be made of glass, or other suitable materials. Referring also toFIG. 2 , theplate 122 is prismoid-shaped, and includes alight incident surface 1221 and alight output surface 1222 at two opposite sides thereof, and aperipheral side surface 1223. Theperipheral side surface 1223 is located between and adjoins both thelight incident surface 1221 and thelight output surface 1222. In this embodiment, thelight incident surface 1221 is a rectangular plane surface. Thelight output surface 1222 is a plane surface inclined relative to thelight incident surface 1221, and thelight output surface 1222 is slanted toward positive X-axis direction. Theperipheral side surface 1223 is comprised of twoparallel plane surfaces 122A and two inclinedflat surfaces 122B. The twoplane surfaces 122A each are perpendicular to thelight incident surface 1221. The two inclinedflat surfaces 122B each are inclined relative to thelight incident surface 1221. Each of theplane surfaces 122A and the inclinedflat surfaces 122B extends from a periphery of the rectangularlight incident surface 1221 and adjoins thelight output surface 1222. - Referring also to
FIG. 3 , thestreet lamp 10 further includes alamp post 15 for holding thelight source 121 and theplate 122. In this embodiment, thelamp post 15 is arranged adjacent to thetraffic lane 11. Thelight source 121 is attached to theplate 122 and intimately contacts thelight incident surface 1221, and thelight source 121 is fixed to an end of thelamp post 15 far away from thetraffic lane 11. In such that, thelight source 121 and theplate 122 are located above thetraffic lane 11. Thelight source 121 emits light to transmit through theplate 122 and illuminate a portion of thetraffic lane 11. The illuminated portion includes afirst section 110 and a second section 1122 at opposite sides of the projection of thelight source 121 on thetraffic lane 11.FIG. 3 also shows avehicle 18 is driven by a driver P. Thevehicle 18 currently travels in thefirst section 110 of thetraffic lane 11 and is about to passing through thefirst section 110 thus approaching thesecond section 112. - In operation, when electric current is applied to the
light source 121, thelight source 121 emits light. The light enters theplate 122 through thelight incident surface 1221 and passes through theplate 122. Theplate 122 refracts the light along an X-axis direction. The X-direction is parallel to the lengthwise direction of thetraffic lane 11. Generally, thelight output surface 1222 provides refracted light that exits theplate 122. Overall, theplate 122 deviates the light from the central axis M of thelight source 121 along the positive X-axis direction. A light intensity on thelane 11 is generally not uniform. A maximum light intensity in thesecond section 112 is beneficially greater than a maximum light intensity in thefirst section 110. Generally, if the maximum light intensity in thefirst section 110 is less than or equal to 60 percent of the maximum light intensity in thesecond section 112, glare can be avoided. Thesecond section 112 includes a portion illuminated by light beams emitted at an illumination angle of from about 45 degrees to about 85 degrees (seeFIG. 3 ). The term “illumination angle” means an angle between a light beam and the central axis M. Preferably, the maximum light intensity in thefirst section 110 is less than or equal to 20 percent of the maximum light intensity in the portion of thesecond section 112. The glare can be avoided by recuding the maximum light intensity in thefirst section 110. -
FIG. 4 is a graph illustrating light intensity distribution of the street lamp ofFIG. 1 in one example. A point C in the graph illustrates that the maximum light intensity in thesecond section 112 is about 950 candela (cd). In contrast, a point D in the graph illustrates the maximum light intensity in thefirst section 110 is about 550 cd. When the driver P in thevehicle 18 travels at thefirst section 110, light with high intensity (for example, light intensity of more than 550 cd) can not directly enter the driver P's eyes, thus he/she is liable to avoid experiencing uncomfortable glare. Furthermore, when the driver P approaches at thesecond section 112, he/she can also avoid experiencing uncomfortable glare, because theplate 122 deviates light from thelight source 121 along the positive X-axis direction, and the X-axis direction is opposite to a viewing direction of the driver P's eyes. - The
peripheral side surface 1223 may have a reflective layer (not labeled) formed thereon. The reflective layer can reflect light thereon. Therefore, at least part of the reflected light may be recycled in theplate 122 and eventually refracted by theplate 122 to exit thelight output surface 1222. As such, light utilization efficiency of thelight source 121 is enhanced. - It is noted that the
street lamp 10 is not limited to have the above-mentioned first embodiment, the street lamp described in below embodiments, are acceptable as well. - Referring to
FIGS. 5 and 6 , astreet lamp 20, in accordance with a second embodiment, is shown. Thestreet lamp 20 is similar to thestreet lamp 20 of the first embodiment in structure and principle, and includes a solid-state light source 221 and alight guiding plate 222. Thelight guiding plate 222 includes alight incident surface 2221, alight output surface 2222, and aperipheral side surface 2223. Thestreet lamp 20 differs from thestreet lamp 10 in that thelight output surface 2222 is not a plane surface. Instead, thelight output surface 2222 is an arc-shaped surface, such as a concave surface with an arc generatrix extending parallel to a Y-axis perpendicular to the XZ plane. Preferably, a gradient of thesecond surface portion 212 increases gradually along a positive X-axis direction. - Referring to
FIGS. 7 and 8 , astreet lamp 30, in accordance with a third embodiment, is shown. Thestreet lamp 30 is similar to thestreet lamp 10 of the first embodiment in structure and principle, and includes a solid-state light source 321 and alight guiding plate 322. Thelight guiding plate 322 includes alight incident surface 3221, alight output surface 3222, and aperipheral side surface 3223. Thestreet lamp 30 differs from thestreet lamp 10 in that thelight output surface 3222 is not a plane surface. Instead, thelight output surface 3222 includes afirst surface portion 3110, and asecond surface portion 3112 adjoining thefirst surface portion 3110. Thefirst surface portion 3110 is located at a side of theplate 322 adjacent to thefirst section 310 of thetraffic lane 31. Thesecond surface portion 3112 is located at another side of theplate 322 farther away from thefirst section 310. That is, thesecond surface portion 3112 is located adjacent to thesecond section 312 of thetraffic lane 31. In particular, thefirst surface portion 3110 is an inclined flat surface relative to thelight incident surface 3221, and thefirst surface portion 3110 is slanted toward a positive X-axis direction. Thesecond surface portion 3112 is parallel to thelight incident surface 3221. - In alternative embodiments, the
light output surface 3222 may be in other forms. For example, as shown inFIGS. 9 and 10 , astreet lamp 40 according to a fourth embodiment includes a solid-state light source 421 and alight guiding plate 422. Thelight guiding plate 422 includes alight incident surface 4221, alight output surface 4222, and aperipheral side surface 4223. Thelight output surface 4222 includes afirst surface portion 4110, and asecond surface portion 4112. Thestreet lamp 40 differs from thestreet lamp 30 in that the first surface portion is an inclined flat surface relative to thelight incident surface 4221, and thesecond surface portion 4112 is an arc-shaped surface. In particular, thesecond surface portion 4112 is a convex surface with an arc generatrix extending parallel to the Y-axis. - Referring to
FIGS. 11 and 12 , astreet lamp 50 in accordance with a fifth embodiment, includes a solid-state light source 521 and alight guiding plate 522. Thelight guiding plate 522 includes alight incident surface 5221, alight output surface 5222, and aperipheral side surface 5223. Thelight output surface 5222 includes afirst surface portion 5110, and asecond surface portion 5112. Thestreet lamp 50 differs from thestreet lamp 30 in that thefirst surface portion 5110 is an arc-shaped surface, and thesecond surface portion 5112 is a plane surface substantially parallel to thelight incident surface 5221. In particular, thefirst surface portion 5110 is a concave surface with an arc generatrix extending parallel to the Y-axis, and a gradient of thefirst surface portion 5112 increases gradually along a positive X-axis direction. - Referring to
FIGS. 13 and 14 , astreet lamp 60 in accordance with a sixth embodiment, includes a solid-state light source 621 and alight guiding plate 622. Thelight guiding plate 622 includes alight incident surface 6221, alight output surface 6222, and aperipheral side surface 6223. Thelight output surface 6222 includes afirst surface portion 6110, and asecond surface portion 6112. Thestreet lamp 60 differs from thestreet lamp 30 in that thesecond surface portion 6112 is an arc-shaped surface. In particular, thesecond surface portion 6112 is a concave surface with an arc generatrix extending parallel to the Y-axis, and a gradient of thesecond surface portion 6112 increases gradually along a positive X-axis direction. - Referring to
FIG. 15 , astreet lamp 70 in accordance with a seventh embodiment, is shown. Thestreet lamp 70 includes a solid-state light member 721, and a plurality of light guidingunits 722 arranged in columns and rows. In this embodiment, the solid-state light member 721 includes a plurality of LEDs (not labeled) and defines a central axis M. The number of thelight guiding units 722 equals to that of the solid-state light sources 721. Each of the LEDs is arranged on a correspondinglight guiding unit 722, and includes alight incident surface 7221, alight output surface 7222, and aperipheral side surface 7223. Thelight guiding unit 722 is similar to theplate 122 of the first embodiment in structure and principle, except that theperipheral side surface 7223 includes fourplane surfaces 722A with each perpendicular to thelight incident surface 7221. Each of the fourplane surfaces 722A extends from a periphery of the rectangularlight incident surface 7221 and adjoins thelight output surface 7222. All thelight incident surface 7221 are coplanar. In this embodiment, thelight guiding units 722 are formed separately and then assembled together, and theperipheral side surface 7223 of eachunit 722 intimately contacts theperipheral side surface 7223 of a neighboringunit 722. Alternatively, thelight guiding units 722 can be integrally formed. - In operation, each LED emits light to the
corresponding unit 722. All theunits 722 deviate the light from the central axis M along the positive X-axis directions. - Thus, a maximum light intensity in a
second section 712 is essentially greater than the maximum light intensity measured at thefirst section 710. - It is to be understood that the above-described embodiments are intended to illustrate rather than limit the disclosure. Variations may be made to the embodiments without departing from the spirit of the disclosure as claimed. The above-described embodiments illustrate the scope of the disclosure but do not restrict the scope of the disclosure.
Claims (19)
1. A street lamp for mounting on a traffic lane and illuminating the traffic lane, the street lamp comprising:
a solid-state light source configured for emitting light to illuminate a portion of the traffic lane, the illuminated portion comprising a first section and a second section at opposite sides of the projection of the light source on the traffic lane, and the solid-state light source defining a central axis perpendicular to a lengthwise direction of the traffic lane; and
a light-pervious light guiding plate comprising a light incident surface and a light output surface at opposite sides thereof, the light incident surface configured for receiving the light from the light source, and the light output surface configured for emission of the light to the traffic lane, the light guiding plate configured for deviating the light from the light source in a manner such that a maximum light intensity in the first section is less than or equal to 60 percent of a maximum light intensity in the second section.
2. The street lamp of claim 1 , wherein the second section includes a portion illuminated by the light at an illumination angle of from about 45 degrees to about 85 degrees, the maximum light intensity in the first section is less than or equal to 20 percent of the maximum light intensity in the portion of the second section.
3. The street lamp of claim 1 , wherein the light incident surface is a plane surface parallel to the lengthwise direction of the traffic lane.
4. The street lamp of claim 3 , wherein the plate comprises a peripheral side surface located between and adjoining the light incident surface and the light output surface, and the light incident surface is rectangular, the peripheral side surface comprises two parallel plane surfaces each substantially perpendicular to the light incident surface, and two inclined flat surfaces relative to the light incident surface, and each of the plane surfaces and the inclined flat surfaces extends from a periphery of the light incident surface and adjoins the light output surface.
5. The street lamp of claim 4 , wherein the peripheral side surface has a reflective layer formed thereon.
6. The street lamp of claim 3 , wherein the light output surface includes a first surface portion at a side of the plate adjacent to the first section of the lane, and a second surface portion at another side of the plate farther away from the first section, at least the first surface portion is an inclined flat surface relative to the light incident surface, and the inclined flat surface is slanted toward the second section of the lane.
7. The street lamp of claim 6 , wherein the entire light output surface is an inclined flat surface relative to the light incident surface.
8. The street lamp of claim 6 , wherein the second surface portion is a plane surface parallel to the light incident surface.
9. The street lamp of claim 6 , wherein the second surface portion is an arc-shaped surface with an arc generatrix extending perpendicularly to the lengthwise direction of the lane.
10. The street lamp of claim 9 , wherein the second surface portion is a convex surface.
11. The street lamp of claim 9 , wherein the second surface portion is a concave surface, and a gradient of the second surface portion increases gradually along a direction from the first section toward the second section.
12. The street lamp of claim 3 , wherein the light output surface includes a first surface portion at a side of the plate adjacent to the first section of the lane, and a second surface portion at another side of the plate farther away from the first section, at least the second surface portion is a concave surface with an arc generatrix perpendicularly to the lengthwise direction of the lane, and a gradient of the first surface portion increases gradually along a direction from the first section toward the second section.
13. The street lamp of claim 12 , wherein the entire light output surface is a concave surface, and a gradient of the light output surface increases gradually along a direction from the first section toward the second section.
14. The street lamp of claim 12 , wherein the second surface portion is a plane surface parallel to the light incident surface.
15. The street lamp of claim 1 , wherein the plate is made of material selected from the group consisting of resin, silicone, glass, polyethylene terephthalate, polymethyl methacrylate, and polycarbonate.
16. The street lamp of claim 1 , wherein the light source comprises one of a light emitting diode and a light emitting diode chip.
17. A street lamp for mounting on a traffic lane and illuminating the traffic lane, the street lamp comprising:
a plurality of solid-state light sources configured for emitting light to illuminate a portion of the traffic lane, the illuminated portion comprising a first section and a second section at opposite sides of the projection of the light sources on the traffic lane, and each of the solid-state light sources defining a central axis perpendicular to a lengthwise direction of the traffic lane; and
a light-pervious light guiding plate comprising a plurality of light guiding units arranged in columns and rows, each of the units arranged adjacent to a corresponding solid-state light source and comprising a light incident surface and a light output surface at opposite sides thereof, the light incident surface configured for receiving the light from the solid-state light source, and the light output surface configured for emission of the light to the traffic lane, the units configured for deviating the light from the light sources in a manner such that a maximum light intensity in the first section is less than or equal to 60 percent of a maximum light intensity in the second section.
18. The street lamp of claim 17 , wherein the light incident surface of each light source is a plane surface parallel to the lengthwise direction of the traffic lane, and all the light incident surfaces of the light guiding plate are coplanar.
19. The street lamp of claim 18 , wherein each unit comprises a peripheral side surface located between and adjoining the light incident surface and the light output surface, and the light incident surface is rectangular, the peripheral side surface comprises four plane surfaces each substantially perpendicular to the light incident surface, and each of the plane surfaces extends from a periphery of the light incident surface and adjoins the light output surface.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN200910304714.0 | 2009-07-23 | ||
CN2009103047140A CN101963321B (en) | 2009-07-23 | 2009-07-23 | Road illuminating device |
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US20110019405A1 true US20110019405A1 (en) | 2011-01-27 |
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US12/700,928 Abandoned US20110019405A1 (en) | 2009-07-23 | 2010-02-05 | Street lamp |
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CN (1) | CN101963321B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140265874A1 (en) * | 2013-03-14 | 2014-09-18 | Abl Ip Holding Llc | Adaptive Optical Distribution System |
WO2014162681A1 (en) * | 2013-04-03 | 2014-10-09 | 株式会社小糸製作所 | Road lighting device |
EP2573455A3 (en) * | 2011-09-22 | 2014-12-31 | Flos S.P.A. | Lamp with asymmetric luminous intensity |
US9192026B2 (en) | 2013-03-14 | 2015-11-17 | Abl Ip Holding Llc | Veiling zone control |
US20180164645A1 (en) * | 2016-12-14 | 2018-06-14 | Magic Leap, Inc. | Patterning of liquid crystals using soft-imprint replication of surface alignment patterns |
EP4113187A1 (en) * | 2014-11-18 | 2023-01-04 | Quarkstar LLC | Wall wash luminaire with light guide and optical element therefore |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US8485684B2 (en) * | 2011-05-13 | 2013-07-16 | GE Lighting Solutions, LLC | LED roadway luminaire |
CN102937256A (en) * | 2011-08-14 | 2013-02-20 | 黄于民 | Lateral light distribution street lamp |
CN102384430B (en) * | 2011-11-08 | 2013-07-24 | 杭州照相机械研究所 | Guardrail lamp and guardrail lamp lens |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4085318A (en) * | 1974-04-22 | 1978-04-18 | Johns-Manville Corporation | Luminaire and luminaire reflector for use in an off-the roadway lighting arrangement |
US4288847A (en) * | 1979-06-18 | 1981-09-08 | Elmer William B | Compound beam illuminating |
US20060091784A1 (en) * | 2004-10-29 | 2006-05-04 | Conner Arlie R | LED package with non-bonded optical element |
US20080239722A1 (en) * | 2007-04-02 | 2008-10-02 | Ruud Lighting, Inc. | Light-Directing LED Apparatus |
US20090225551A1 (en) * | 2008-03-07 | 2009-09-10 | Industrial Technology Research Institute | Illumination apparatus |
US7828456B2 (en) * | 2007-10-17 | 2010-11-09 | Lsi Industries, Inc. | Roadway luminaire and methods of use |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3203284C2 (en) * | 1982-02-01 | 1984-08-02 | Siemens AG, 1000 Berlin und 8000 München | Broad beam, rotationally symmetrical street light |
CN2544173Y (en) * | 2002-04-09 | 2003-04-09 | 苑泉声 | Reflection road lamp with dizzy-proof board lamp shade |
CN1704641A (en) * | 2004-05-26 | 2005-12-07 | 微杠杆有限公司 | Reflecting mirror bowl and manufacturing method thereof, and road lamp lighting structure using the same |
-
2009
- 2009-07-23 CN CN2009103047140A patent/CN101963321B/en not_active Expired - Fee Related
-
2010
- 2010-02-05 US US12/700,928 patent/US20110019405A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4085318A (en) * | 1974-04-22 | 1978-04-18 | Johns-Manville Corporation | Luminaire and luminaire reflector for use in an off-the roadway lighting arrangement |
US4288847A (en) * | 1979-06-18 | 1981-09-08 | Elmer William B | Compound beam illuminating |
US20060091784A1 (en) * | 2004-10-29 | 2006-05-04 | Conner Arlie R | LED package with non-bonded optical element |
US20080239722A1 (en) * | 2007-04-02 | 2008-10-02 | Ruud Lighting, Inc. | Light-Directing LED Apparatus |
US7828456B2 (en) * | 2007-10-17 | 2010-11-09 | Lsi Industries, Inc. | Roadway luminaire and methods of use |
US20090225551A1 (en) * | 2008-03-07 | 2009-09-10 | Industrial Technology Research Institute | Illumination apparatus |
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EP2573455A3 (en) * | 2011-09-22 | 2014-12-31 | Flos S.P.A. | Lamp with asymmetric luminous intensity |
US9497833B2 (en) * | 2013-03-14 | 2016-11-15 | Abl Ip Holding Llc | Adaptive optical distribution system |
US9192029B2 (en) * | 2013-03-14 | 2015-11-17 | Abl Ip Holding Llc | Adaptive optical distribution system |
US9192026B2 (en) | 2013-03-14 | 2015-11-17 | Abl Ip Holding Llc | Veiling zone control |
US20160037612A1 (en) * | 2013-03-14 | 2016-02-04 | Abl Ip Holding Llc | Adaptive optical distribution system |
US20140265874A1 (en) * | 2013-03-14 | 2014-09-18 | Abl Ip Holding Llc | Adaptive Optical Distribution System |
US10278260B2 (en) * | 2013-03-14 | 2019-04-30 | Abl Ip Holding Llc | Adaptive optical distribution system |
US20190239316A1 (en) * | 2013-03-14 | 2019-08-01 | Abl Ip Holding Llc | Adaptive optical distribution system |
US10716188B2 (en) * | 2013-03-14 | 2020-07-14 | Abl Ip Holding Llc | Adaptive optical distribution system |
WO2014162681A1 (en) * | 2013-04-03 | 2014-10-09 | 株式会社小糸製作所 | Road lighting device |
JPWO2014162681A1 (en) * | 2013-04-03 | 2017-02-16 | 株式会社小糸製作所 | Road lighting equipment |
EP4113187A1 (en) * | 2014-11-18 | 2023-01-04 | Quarkstar LLC | Wall wash luminaire with light guide and optical element therefore |
US20180164645A1 (en) * | 2016-12-14 | 2018-06-14 | Magic Leap, Inc. | Patterning of liquid crystals using soft-imprint replication of surface alignment patterns |
Also Published As
Publication number | Publication date |
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CN101963321A (en) | 2011-02-02 |
CN101963321B (en) | 2012-06-27 |
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